Java文件中带有带J的红色圆圈(Android Studio) [英] Java files have a red circle with J in it (android studio)

问题描述

我从GitHub下载了一个项目，我和一个朋友正在其中进行开发.一切正常，突然在Java文件的图标上出现一个带有"J"的红色圆圈，并且运行应用程序按钮变为灰色.请帮帮我！

I downloaded a project from GitHub, in which me and a friend are working on. Everything was working fine and all of a sudden a red circle with a "J" in it was on the Java files' icons and the run app button become grayed out. Please help me!

推荐答案

我希望您已经找到了一种解决方法，但如果没有解决方法，以供将来参考:
我假设我们正在谈论此图标:.
如果此回答(或此答案应使文档符合Android-Studio).

I hope you have already found a workaround, but if not/for future reference:
I assume we 're talking about this icon: .
If this answer (or this post) don't seem to be a solution for you, then you should probably go for Configuring Content Roots (docs based on IntelliJ, but this answer should conform the docs to Android-Studio).

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